The use of endogenous gaseous molecules (NO and CO2) to regulate the self-assembly of a dual-responsive triblock copolymer

A nitric oxide (NO) and carbon dioxide (CO2) dual-responsive block copolymer was self-assembled in aqueous solution upon gas stimuli to form nanostructures.

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Block copolymer self-assembly assisted fabrication of laterally organized- and stacked- nanoarrays

Nanotechnology ◽

10.1088/1361-6528/ac44ea ◽

2021 ◽

Author(s):

Vignesh Suresh ◽

Ah Bian Chew ◽

Christina Yuan Ling Tan ◽

Hui Ru Tan

Keyword(s):

Block Copolymer ◽

Self Assembly ◽

The Self ◽

Functional Surfaces ◽

Self Assembled ◽

Block Copolymer Lithography ◽

Unique Surface ◽

Copolymer Lithography

Abstract Block copolymer (BCP) self-assembly processes are often seen as reliable techniques for advanced nanopatterning to achieve functional surfaces and create templates for nanofabrication. By taking advantage of the tunability in pitch, diameter and feature-to-feature separation of the self-assembled BCP features, complex, laterally organized- and stacked- multicomponent nanoarrays comprising of gold and polymer have been fabricated. The approaches not only demonstrate nanopatterning of up to two levels of hierarchy but also investigate how a variation in the feature-to-feature gap at the first hierarchy affects the self-assembly of polymer features at the second. Such BCP self-assembly enabled multicomponent nanoarray configurations are rarely achieved by other nanofabrication approaches and are particularly promising for pushing the boundaries of block copolymer lithography and in creating unique surface architectures and complex morphologies at the nanoscale.

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Self-assembled chromogen-loaded polymeric cocoon for respiratory virus detection

Nanoscale ◽

10.1039/d0nr06893d ◽

2021 ◽

Vol 13 (1) ◽

pp. 388-396

Author(s):

Indra Memdi Khoris ◽

Akhilesh Babu Ganganboina ◽

Tetsuro Suzuki ◽

Enoch Y. Park

Keyword(s):

Aqueous Solution ◽

Self Assembly ◽

Respiratory Virus ◽

Virus Detection ◽

The Self ◽

Signal Molecules ◽

Self Assembled

Inspired by the self-assembly approach, in this work, the chromogen, 3,3′,5,5′-tetramethylbenzidine (TMB), was successfully co-precipitated in aqueous solution to form collective nanoparticles (NPs) of signal molecules (TMB-NPs).

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Self-assembly of rod-terminally tethered three-armed star-shaped coil block copolymer: Investigation of the presence of the branching in the coil to the self-assembled behavior

Polymer ◽

10.1016/j.polymer.2008.09.059 ◽

2008 ◽

Vol 49 (25) ◽

pp. 5596-5601 ◽

Cited By ~ 12

Author(s):

Yingdong Xia ◽

Zhaoyan Sun ◽

Tongfei Shi ◽

Jizhong Chen ◽

Lijia An ◽

...

Keyword(s):

Block Copolymer ◽

Self Assembly ◽

The Self ◽

Self Assembled

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SANS study on self-assembled structures of Pluronic F127 triblock copolymer induced by additives and temperature

Journal of Applied Crystallography ◽

10.1107/s1600576713030094 ◽

2013 ◽

Vol 47 (1) ◽

pp. 53-59 ◽

Cited By ~ 19

Author(s):

Tae-Hwan Kim ◽

Young-Soo Han ◽

Jong-Dae Jang ◽

Baek-Seok Seong

Keyword(s):

Aqueous Solution ◽

Triblock Copolymer ◽

Structural Information ◽

Material Balance ◽

The Self ◽

Pluronic F127 ◽

Spherical Micelle ◽

Simple Material ◽

Temperature Range ◽

Self Assembled

In the temperature range of 303–333 K, the self-assembled structures of a mixture of Pluronic F127 triblock copolymer [PEO106PPO70PEO106; PEO is poly(ethylene oxide) and PPO is poly(propylene oxide)] and an organic derivative, 5-methyl salicylic acid (5mS), in aqueous solution have been investigated using small-angle neutron scattering (SANS). Above a 5mS concentration of 1.93 g l−1, the F127–5mS mixture solution became cloudy with a blue colour arising from the Tyndall effect, indicating that large polymer aggregates had formed in the mixture solution. SANS measurements showed that the self-assembled structure of the F127–5mS mixture transformed from a spherical to a cylindrical micelle with increasing the concentration of 5mS in the temperature range of 303–323 K. When the 5mS concentration was increased to 3.3 g l−1, the self-assembled structure of the F127–5mS mixture at 333 K underwent an additional phase transition from a cylindrical to a spherical micelle of large size at a 5mS concentration of 2.75 g l−1, although its self-assembled structure changed from a spherical to a cylindrical micelle at a 5mS concentration of 1.93 g l−1as well. The phase transitions are explained by the variation of the mass fraction of the hydrophilic part of F127 and the coupled effect of the limited solubility and the strong tendency to bind with amphiphilic molecules of 5mS. Using a simple material balance equation and the structural information obtained from SANS model analyses, the numbers of D2O and of 5mS molecules in the core and corona regions are calculated. This result can provide a simple and easy way to prepare various nanostructures using a Pluronic triblock copolymer in aqueous solution and may be very useful for practical applications of a Pluronic polymer such as various nanobuilding blocks or nanotemplates.

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Evaluation of Self-Assembly Pathways to Control Crystallization-Driven Self-Assembly of a Semicrystalline P(VDF-co-HFP)-b-PEG-b-P(VDF-co-HFP) Triblock Copolymer

Molecules ◽

10.3390/molecules25174033 ◽

2020 ◽

Vol 25 (17) ◽

pp. 4033

Author(s):

Enrique Folgado ◽

Matthias Mayor ◽

Vincent Ladmiral ◽

Mona Semsarilar

Keyword(s):

Self Assembly ◽

Triblock Copolymer ◽

Vinylidene Fluoride ◽

The Self ◽

Selective Solvents ◽

Poly Vinylidene Fluoride ◽

Self Assembled ◽

Assembly Behavior ◽

Assembly Pathways ◽

Induced Crystallization

To date, amphiphilic block copolymers (BCPs) containing poly(vinylidene fluoride-co-hexafluoropropene) (P(VDF-co-HFP)) copolymers are rare. At moderate content of HFP, this fluorocopolymer remains semicrystalline and is able to crystallize. Amphiphilic BCPs, containing a P(VDF-co-HFP) segment could, thus be appealing for the preparation of self-assembled block copolymer morphologies through crystallization-driven self-assembly (CDSA) in selective solvents. Here the synthesis, characterization by 1H and 19F NMR spectroscopies, GPC, TGA, DSC, and XRD; and the self-assembly behavior of a P(VDF-co-HFP)-b-PEG-b-P(VDF-co-HFP) triblock copolymer were studied. The well-defined ABA amphiphilic fluorinated triblock copolymer was self-assembled into nano-objects by varying a series of key parameters such as the solvent and the non -solvent, the self-assembly protocols, and the temperature. A large range of morphologies such as spherical, square, rectangular, fiber-like, and platelet structures with sizes ranging from a few nanometers to micrometers was obtained depending on the self-assembly protocols and solvents systems used. The temperature-induced crystallization-driven self-assembly (TI-CDSA) protocol allowed some control over the shape and size of some of the morphologies.

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Critical Micelle Density for the Self-Assembly of Block Copolymer Surfactants in Supercritical Carbon Dioxide

Langmuir ◽

10.1021/la990140q ◽

2000 ◽

Vol 16 (2) ◽

pp. 416-421 ◽

Cited By ~ 31

Author(s):

F. Triolo ◽

A. Triolo ◽

R. Triolo ◽

J. D. Londono ◽

G. D. Wignall ◽

...

Keyword(s):

Carbon Dioxide ◽

Block Copolymer ◽

Supercritical Carbon Dioxide ◽

Self Assembly ◽

The Self ◽

Supercritical Carbon

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Sphere-to-rod Transition of Block Copolymer in Solution Induced by Variation of Concentration

10.31219/osf.io/x4zc7 ◽

2020 ◽

Author(s):

Xiaoli Zhan

Keyword(s):

Block Copolymer ◽

Ethylene Oxide ◽

Self Assembly ◽

Triblock Copolymer ◽

Short Chain ◽

Copolymer Concentration ◽

Poly Ethylene Oxide ◽

Self Assembled ◽

Assembly Behavior ◽

Poly Ethylene

A short-chain triblock copolymer EO9-DMS7-EO9 was synthesized by couplingreaction of allyl-terminated poly(ethylene oxide) and Si–H-terminatedpoly(dimethylsiloxane). The structure and purity of synthesized copolymer wascarefully characterized. Self-assembly behavior of EO9-DMS7-EO9 triblockcopolymer in water was investigated. And it was found that along with theincrease of copolymer concentration, morphology of self-assembled aggregatestransits from sphere to rod. A plausible understanding of the morphologytransition for the investigated triblock copolymer was proposed

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Block copolymer self-assembly controlled by the “green” gas stimulus of carbon dioxide

Chemical Communications ◽

10.1039/c4cc03412k ◽

2014 ◽

Vol 50 (79) ◽

pp. 11631-11641 ◽

Cited By ~ 86

Author(s):

Qiang Yan ◽

Yue Zhao

Keyword(s):

Carbon Dioxide ◽

Block Copolymer ◽

Block Copolymers ◽

Self Assembly ◽

The Self ◽

Green Stimulus

CO2 can act as a “green” stimulus to precisely tune the self-assembly of block copolymers.

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New Insights on the Self-Assembly of Bio-sourced Block Copolymer MH-b-PS in Aqueous Solutions: Nanocorals, Cubosomes & Nanocubes

10.33774/chemrxiv-2021-bwg91 ◽

2021 ◽

Author(s):

Yomen Atassi ◽

Redouane Borsali

Keyword(s):

Aqueous Solution ◽

Block Copolymer ◽

Aqueous Solutions ◽

Self Assembly ◽

Room Temperature ◽

Linear Structure ◽

The Self ◽

Fine Tuning ◽

Experimental Parameters ◽

First Time

Polymer self-assembly in solution still constitutes a simple methodology for the preparation of elegant yet sophisticated nanomaterials. This work aims at presenting how the fine tuning of the experimental parameters of the nanoprecipitation process can lead to a variety of novel morphologies ranging from nanocorals through cubosomes to nanocubes. A carbohydrate dibloc copolymer with a simple and linear structure MH1.2k-b-PS2.3 has been used as a model to illustrate the formation of these new self-assemblies. This is the first time that nanocube morphology has been generated using this type of bio-sourced co-polymer in aqueous solution and at room temperature.

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